kubenetes 部署nacos集群

存储

nacos 官方文档：https://github.com/nacos-group/nacos-k8s
本文档使用nfs存储，nfs的搭建参考文档：https://www.cnblogs.com/pgy674477230/p/16326880.html
创建pvc
cat nacos-pvc-headless.yml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nacos-pvc-headless
  namespace: test03
  annotations:
    pv.kubernetes.io/bind-completed: 'yes'
    pv.kubernetes.io/bound-by-controller: 'yes'
    volume.beta.kubernetes.io/storage-provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 5Gi
  volumeName: pvc-770acf2a-b03b-463b-9b44-d8a90d8c6862
  storageClassName: managed-nfs-storage
  volumeMode: Filesystem
status:
  phase: Bound
  accessModes:
    - ReadWriteMany
  capacity:
    storage: 5Gi

创建服务

cat nacos-service-headless.yml

apiVersion: v1
kind: Service
metadata:
  name: nacos-headless
  labels:
    app: nacos
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
spec:
  ports:
    - port: 8848
      name: server
      targetPort: 8848
    - port: 9848
      name: client-rpc
      targetPort: 9848
    - port: 9849
      name: raft-rpc
      targetPort: 9849
    ## 兼容1.4.x版本的选举端口
    - port: 7848
      name: old-raft-rpc
      targetPort: 7848
  clusterIP: None
  selector:
    app: nacos

使用nodeport提供外部web访问 或者使用ingress，本文使用nodeport方式，创建暴露服务
cat nacos-web.yml

kind: Service
apiVersion: v1
metadata:
  name: nacos-web
  namespace: test03
spec:
  ports:
    - name: http
      protocol: TCP
      port: 8848
      targetPort: 8848
      nodePort: 31848
  selector:
    app: nacos
  clusterIP: 10.2.202.97
  clusterIPs:
    - 10.2.202.97
  type: NodePort
  sessionAffinity: None
  externalTrafficPolicy: Cluster

创建配置

cat nacos-cm.yml

apiVersion: v1
kind: ConfigMap
metadata:
  name: nacos-cm
data:
  mysql.db.name: "nacos_devtest"
  mysql.port: "3306"
  mysql.user: "nacos"
  mysql.password: "nacos"
  mysql.host: "mysql"

创建StatefulSet 部署集群

cat nacos-headless.yml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: nacos
spec:
  serviceName: nacos-headless
  replicas: 3
  template:
    metadata:
      labels:
        app: nacos
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - nacos
              topologyKey: "kubernetes.io/hostname"
      containers:
        - name: k8snacos
          imagePullPolicy: Always
          image: nacos/nacos-server:latest
          resources:
            requests:
              memory: "2Gi"
              cpu: "500m"
          ports:
            - containerPort: 8848
              name: client
            - containerPort: 9848
              name: client-rpc
            - containerPort: 9849
              name: raft-rpc
            - containerPort: 7848
              name: old-raft-rpc
          env:
            - name: NACOS_REPLICAS
              value: "3"
            - name: MYSQL_SERVICE_DB_NAME
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.db.name
            - name: MYSQL_SERVICE_PORT
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.port
            - name: MYSQL_SERVICE_USER
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.user
            - name: MYSQL_SERVICE_PASSWORD
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.password
            - name: MYSQL_SERVICE_HOST
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.host
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: NACOS_APPLICATION_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
            - name: NACOS_SERVERS
              value: "nacos-0.nacos-headless.test.svc.cluster.local:8848 nacos-1.nacos-headless.test.svc.cluster.local:8848 nacos-2.nacos-headless.test.svc.cluster.local:8848"
  selector:
    matchLabels:
      app: nacos